Mold



3 Sheets-Sheet 1 MOLD *File'd Nov. 14.' 1925 R. J. OWEN ET AL May '19, 1925.

. mw ki mm May.19,1925. v I

, R.J.OWEN ETAL MOLD Filed Nov. 4. 1912s a Sheets-Sheet 2 May 19, 1925. 1,538,584

R. J. OWEN ET AL.

MOLD Filed Nov. 14, 1923 5 Sheets-Sheet 5 ii l) it ln order Patented May 19, 1925.

ourreo sra'rss PATENT orr cs.

RDBERT J. OWEN AND HARRY D BINDSBERG, 0E CINCINNATI, OHIO, ASSIGNORS TO HARRY J. HATER, 0E GI NCINNATI, OHIO.

MGLI).

Application filed November it, 1923. Serial no. mess.

,paratively low fusing points. ll'lore par-' ticularly, the invention relates to molds of this type for producing hollmv or cupshaped cylindrical castings such as skirted pistons l'or internal combustion engines.

, Specifically the present invention relates to certain definite improvements in the molding" device shown and described in application Serial No. 630,600, filed April '4', 1923, by John L. Schnobrich.

In the device disclosed in said application,

as well as in the prior art, thereare provided a pair of separable mold sections which are slidubly mounted upon a suit able base, each section having a complementary part of the mold cavity, and the base itself :t'orming the bottom of such mold cavity.

The presentinvention seeks to improve upon the former construction by providing each movable section with a portion, which portions, when the sections are assembled, together constitute the bottom of the mold cavity, and by mounting the movable sections upon spaced guide rails in such a manner that the lower portions thereof, forming the bottom of the mold cavity, are supported above the base or frame of the machine.

The present invention also contemplates provision of an improved constrlu'tion oi supporting raclc for receiving the core sections \vhcnthcy are removed from be mold cavity.

that the invention may be readily understood, reference is hadto the accompanying drmvines forming part of this specification, and in which:

Figure 1 is a plan view of the improved molding machine;

Figure 2 is a longitudinal vertical section therethrough on the line 2-2 of Figure 1;

Figure 3 is a transverse s tion substantially on the line 3---3 of Figure 1 looking in the direction of the arrows, and

Figure a fragmentary side elevation showing one of the supporting" mils with the mold sections resting thereon.

We have selected for purposes of illustration, a one-man ll'lUlCl. of the type shown in the above mentioned application, although the present invention is by no means limited to av mold otthis special type.

Referring to the drawings in detail, our improved molding machine comprises a suitable base or frame 1 preferably of skeleton construction, and comprising the crossbars 1. On this frame, in a manner to be hereinafter described, are mounted two separable mold sections 2 and 3. The meeting faces of these sections are so shaped as to form Within the same a mold cavity 4, which, in the case of a piston mold, is of course circular in plan.

A guts or inlet, leading to the mold cavity 4, is also formed in the meeting faces of the two mold sections, as indicated at 5 in Figure 3, and this gate may be of any desired construction.

It is common practice in apparatus of this character to provide seven cooperating core members fittine' within. the upper part of the mold cavity, and we have illustrated these seven members in the drawing. It will be understood however that any.suitubleorsdesired number or construction of COr mQIflhere may be employed in connectionWith the present invention.

"he core members are clearly shown in Figures 1 and 2- and comprise a central member 7, flanked by a pair of associated members 6 and 8, and four members 10,11, 12 and 12-) fitting in pairs at each side of the central group.

Asillustruted, the three midlle members (i, 7 and 8 are provided with upstanding rods or handles 9'by which they may be manipulated, and an arm, having ahandle at its end, is also rigidly secured to each of the four core mcn'ibers 1O, 11, 12 and 13, such arms extending in-thesame general direction end being substantially horizontal. The arms are designatedby the characters 14, 15, 18 and 19, the arms Hand 15 being bent aroumlthrough substantially 180 degrees, and t.l1e';fo11r handles carried by the arms are designated 16, ll 203.1141 21, respectively.

In order to properly position the core members and 11, and 12 and 13, we preferably-provide pins 22 and 23, set into the mold sections 2 and 3, respectively, ad- 'acent the meeting edges of the corememers, as clearly shown in Figures 1 and 2.

Set into opposite sides of the mold sec- ;tions 2 and 3 are two pairsof pins or studs 24. The studs formin each pair are paral- "lel and spaced sli htly apart, and their outer ends are re uced and threaded as shown at 25. A a slot 27 therein,

pair of studs 24, and is secured in position. thereon by means of nuts plate or bracket 26, having ts over the ends 25 of each The lower ends of the plates or brackets @126 are forked, as indicated at 28 in Figure 2, and these forked ends are so shaped as to snugly fit over racks 29, circular in cross-section, and provided with teeth on their upper sides. To the iunerendof eachto the ends of the base or frame 1 by means of bolts 33.

Instead of the bottom of the mold cavity being formed by the base itself, as. in the prior application above mentioned,--such bottom, is formed, in our improved con struction, by means of a pair of plates 34 and 35 secured to the lower ends of the mold sections 2 and 3, respectively, as by screws 36. These plates cooperate with the mold sections proper to completely enclose the mold cavity, entirely independent of the base of the machine.

Interposed between the end of each rack 29 and the adjacent wall of the mold section, and surrounding and rigidly secured to the core member 30 is a collar 31. This collar is of such a size that it cannot pass through theforked ends of the bracket 26, but will engage with the prongs 28 thereof fora purpose hereinafter described.

One of the racks 29 is in engagement with a pinion 37 secured'to a shaft 38 journaled in extensions 32* of" the bracket 32 and extending a considerable distance beyond said bracketyas indicated at 38 in Figure 1,

this extended portion being rcferably en-' larged. At-the extreme end, this enlarged "portion 38' of the shaft 38 carries an .operatmg lever 39, having an arm 40 pivotallyconnected at 41 with a link 42. The other end of this link is itself pivotally connected at 43 with a drank-arm 44 secured to a shalt 45, journaledi'n extensions 32 of the bracket 32 at theother side of the mold, and havin rigidly mounted thereon a'pinion 46 which engages with the other rack 89.

of the frame and are 50 positioned relative.

, to the plates 34 and 35 that these plates lie between, but out of contact with the supporting rails. Each rail 47 is provided along its outer edge with an upstanding guide, flange 48, the mold sections fitting snugly between such guide flanges, as shown 11 Figure 3.

Adjacent the meeting edges of the mold section each guide flange 48 is cut away down to the level oi?- the bearing surface of the rail, as indicated at 48 in Figure 4. The purpose of this is to permit the ready removal or brushing awayof any foreign matter that may lodge upon the runways or rails and which is pushed toward the center when the mold sections are brought together. If it were not for'this cut away portion it would he difiicult, if not impossible, to clean away the foreign matter from behind the guide. flange as the mold sections move toward each other.

From the foregoing it will be obvious that when the lever 39 is swung upwardly from the position shown in Figure 2, the two pinions 37 and 46 will be simultaneously rotated and will simultaneously cause the racks 29 to travel in opposite direction. The first part of this movement results in withdrawing the core members 30 from the cavity of the mold. After this initial move- I mcnt, a further movcmentin the same direction causes the collars 31 to engage the lower forked ends of the brackets 36, and thus, as the movement of the racks continues, these b1'ackets, togcthcr with the mold sections 2' and 3, toevhielr theyare attached, are simultaneously moved away from each other or in ,opposite directions, such sections sliding 'upon the runways 47 as they are moved.

I In order to lock the moldsections tightly together during the casting operation, we

provide, as has already beenproposed, a pair of latches or hooks 49. mounted one at each side of the mold. These hooks are adapted to engage pins 50, set into one of the mold' sections. and are so formed that the point or beak of the hook underlies the pin, when in locked position, as'shown in dotted lines .in Figure 2. In order therefore to disengage the hooks from the pins it is necessa when the hooks are swung u wardly on their pivots. To accomplish t 's, we e1nploy the constmctiondes'cribed in detail in the above mentioned an and shown in F gu es. he p se t case.

to first move them longitudi-. nally so that the beak will clear the pins From these it will be seen that each hook meats;

49 is jou naled upon an eccentric 51, these eccentrics being rigidly secured to a shaft 52 journalcd in the mo:l section 3. The ends of the shaft 52 are extended beyond the eccentrics and. carry transversely disposed radially projecting pins 56. These ins are adapted to engage pinsf55, carrie by the hooks 49, so as to elevate the hooks into re lease position as the shaft 52 is rotated. In order to rotate this shaft, we secure to one end thereof a crank arm 53 provided-at its end with a handle 54, as clearly shown. in Figure 1. Q

In order to facilitate the work of the single operator of this machine of the fone man type, and to avoid possible damage to the core members, we provide a special holder to receive these core members when they are removed from the mold cavity. This holder comprises a pair of upstanding arms or side members 57 rigidly secured to the base plate or frame 1. To the upper ends of the side members 57 are rigidly secured a pair of inclined pans or. trays 58 and 59, by means'of brackets on lugs 58 and 59, preferably formed integral therewith. Each of these pans or trays may conveniently be made of cast iron or the like, but areprovided with aliningl 60 of sheet brass or other relatively soft metal so as to. prevent damage to the core memhere when the same are placed therein.

It will be understood that while we have shown and described our improved features of construction in connection with a mold of the one-man t i our invention is b no means liniited to molds of this type, but is equally applicable to the older types of mold for which two operators are required. What we claim is: 1. In combination, a metal mold for forming cylindrical articles, comprising a pair of movable separable sections each having an inner surface forming part of the curved wall of the'open top mold cavity, and a pair ,of' independent plates secured one to the lower end of each of said sections and'serw ing, when said sections are assembled to form the bottom of the mold cavity, and supporting means on wh ch said sections are .slidably mounted.

2. The combination with a metal mold comprising a pair of movable separable sections, said sections together forming the entire mold cavity, including the bottom, of a pair of parallel spaced rails on which both oi-said sections are slidably supported at their. edges.-

3. The combination with a metal mold at the outer side of such surface.

4. The combination with a metal mold comprising a pair of separable sections, said sections together forming the entire mold cavity, including the bottom, of a pair of spaced railson which said sections are slidably supported, each rail having a flat bearing surface, and an upstanding guide-flan e at the outer side of such surface, said gui 'eflange being cutaway down to the level of the bearing surface at the point where saidsections come together. i

5. In combination. a metal mold for forming cylindrical articles, comprisin I a pair of movable separable sections each having an inner surface formingipart of the curved Wall of the mold cavity, and a pair of plates secured one to each of said sections and serving, when said sections are assembled to form the bottom of the mold cavity, and a pair of spaced rails on which both of said sections.

are slidably supported, said plates lying chine comprising a frame and a pa r (if sepaw rable mold sections mounted thereon, each containing complementary parts of the mold cavity, said cavity being open at the top, of a plurality of core members adapted to fit Within said cavity, and a supporting rack carried by the base to receive the core members when they are removed from the mold cavity, said rack comprising a pan or tray lined with a sheet of relatively soft metal, whereby damage to the core members by contact with such pan is prevented.

In testimony whereof We aflix our signm titres.

ROBERT J. OWEN. HARRY D. RINDSBERG.

pans or trays arranged one above 

